| 摘要 |
The present invention relates to an electric damper for a heat exchanger that includes: a body having a coupling part formed on the top surface thereof, the coupling part being open on the top thereof, a flange part formed on one side surface thereof, a through hole formed on the top portion of the inner peripheral surface thereof, and a fixing part formed on the bottom surface of the inner peripheral surface thereof; a first damper having a rotary shaft connected to a driving shaft of a driving motor and the fixing part of the body, the rotary shaft having fastening holes formed on top and underside thereof, a shutter formed integrally with the rotary shaft, a plurality of coupling members formed on both sides of the shutter, and a closing packing disposed along the outer peripheral surface of the shutter; a pair of second dampers located on both sides of the first damper and each having a plurality of coupling holes formed on one surface of the shutter in such a manner as to correspond to the coupling members of the first damper and a closing packing disposed along the outer peripheral surface thereof; connection members adapted to allow the coupling members of the first damper to be passed through the coupling holes of the second dampers to fixedly connect the first damper and the second dampers; and space portions formed by the connection of the first damper and the second dampers through the connection members. According to the present invention, the first damper is rotatably disposed inside the cylindrical body by mean of the driving motor, and the pair of second dampers is fixed to both sides of the first damper by means of the connection members so as to form the space portions therebetween, so that the temperature difference between external cool air and internal hot air colliding each other is reduced at the point where the closing packings disposed on the outer peripheral surfaces of the first damper and the second dampers are brought into close contact with the inner peripheral surface of the body, thus preventing the freezing occurring by the drastic temperature difference, maintaining the air tightness more rigidly, and improving the durability of the electric damper. |
